Worktop of a roller cabinet



FIG. 1 is a front view of a worktop of a roller cabinet showing my new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is bottom view thereof; and,

FIG. 6 is a top view thereof. 

The ornamental design for a worktop of a roller cabinet, as shown and described. 